10
Owner’s Manual
150CC VIPER 4-CYCLE ENGINE
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M-F 8-5 CST
primer
bulb
WARNING
CARBON MONOXIDE GAS IS TOXIC. MOVE THE ENGINE
TO A WELL-VENTILATED AREA OUTDOORS, TO PREVENT
CARBON MONOXIDE POISONING. INHALATION CAN
CAUSE UNCONSCIOUSNESS AND DEATH.
NEVER LEAVE ENGINE RUNNING WHILE UNATTENDED.
MOVE ENGINE TO A WELL-VENTILATED AREA, ALWAYS
OUTDOORS, TO PREVENT CARBON MONOXIDE POISONING.
MOVE TO AN AREA AWAY FROM FLAMES OR SPARKS, TO
AVOID IGNITION OF VAPORS IF PRESENT.
CAUTION
OPERATING ENGINE ON ANGLES GREATER THAN 25
DEGREES WILL CAUSE THE ENGINE TO LOSE LUBRICATION
AND SEIZE.
STARTING AND STOPPING THE ENGINE
Review “safety and warning precautions” and “pre-operation
inspection” sections before starting engine.
MANUAL-START ENGINE
1. Move engine to a well-ventilated area, always outdoors, to
prevent carbon monoxide poisoning.
2. Move to an area away from flames or sparks, to avoid
ignition of vapors if present.
3. Remove all debris from air cleaner holes and fuel cap to
ensure proper air flow.
4. Move the ON/OFF switch to ON.
5. Press primer bulb three times. Let bulb fully recover
between each depression. SEE FIGURE 3.
6. Grasp starter handle and pull out slowly, until resistance is
felt. Without letting it retract, pull rope with a rapid stroke.
DO NOT pull out the rope all of the way. Let it return to
its original position slowly. Repeat this step until engine
starts.
To Stop the Engine:
1. Move the ON/OFF switch to OFF.
2. Pull the starter handle slowly and return the handle to its
original position when resistance is felt. This operation will
prevent outside moisture from entering the combustion
chamber.
FIGURE 3
MAINTENANCE AND STORAGE
Please read the maintenance schedule, found in the
accompanying combined exhaust and evaporative emissions
control warranty statement, and observe these recommended
care operating intervals to extend the life of your engine.
Good maintenance is essential for safe, economical, and
trouble-free operation. It will also help reduce air pollution.
To help you properly care for your engine, the following
pages include routine inspection procedures and simple
maintenance procedures using basic hand tools. Other service
tasks that are more difficult, or require special tools, are best
handled by professionals and are normally performed by a
technician or other qualified mechanic.
Maintenance, replacement or repair of the emissions
control devices and systems may be performed by any
non-road engine repair establishment or individuals.
However, items must be serviced by an authorized dealer
to obtain “no charge” emissions control warranty service.
ENGINE MAINTENANCE
For daily maintenance checks, review “pre-operation
inspection” section and EPA Emission Warranty Statement
(included with this product)
.
LUBRICATION
Choose 4-cycle engine oil that meets or surpasses the latest
API service classification SJ or equivalent as labeled on the oil
container. Synthetic oils may be substituted for petroleum-
based oils in extreme temperatures. For temperatures higher
than 32 °F, use SAE 30 or SAE 10W-30 motor oil. Use SAE 5W-30
or SAE 10W if temperatures are below 32 °F. DO NOT USE SAE
10W-40 MOTOR OIL.
